<template>
	<div class="goods" ref="goods">
    <div class="good-wrapper">
      <div class="menu-wrapper" ref="menuWrapper">
        <ul>
          <li v-for="(item,index) in goods" class="menu-item" :class="{'current':currentIndex===index}" @click="selectMenu(index,$event)">
            <span class="text border-1px" >
              <icon-discount v-if="item.type>-1" :type="item.type" size="3"></icon-discount>{{item.name}}
            </span>
          </li>
        </ul>
      </div>
      <div class="foods-wrapper" ref="foodsWrapper">
        <ul>
          <li v-for="item in goods" class="foods-list food-list-hook" >
            <h1 class="title">{{item.name}}</h1>
            <ul>
              <li v-for="food in item.foods" class="food-item" @click="_selectFood(food,$event)">
                <div class="pic">
                  <img :src="food.icon">
                </div>
                <div class="content">
                  <h2 class="name">{{food.name}}</h2>
                  <p class="desc">{{food.description}}</p>
                  <div class="extra">
                    <span>月售{{food.sellCount}}份</span>
                    <span>好评率{{food.rating}}%</span>
                  </div>
                  <div class="price">
                    <span class="now">&yen;{{food.price}}</span>
                    <span class="old" v-if="food.oldPrice">&yen;{{food.oldPrice}}</span>
                  </div>
                </div>
                <div class="cartcontrol-wrapper">
                  <cartcontrol :food="food"  @add="_drop"></cartcontrol>
                </div>
              </li>
            </ul>
          </li>
        </ul>
      </div>
    </div>
    <food :food="selectFood" ref="foodDesc" @foodAdd="_drop"></food>
    <shopcart :selectFoods="selectFoods" ref="shopcart" :deliveryPrice="seller.deliveryPrice" :minPrice="seller.minPrice"></shopcart>
  </div>
</template>

<script type="text/ecmascript-6">
 import BScroll from 'better-scroll'
 import iconDiscount from 'components/icon/iconDiscount.vue'
 import shopcart from 'components/shopcart/shopcart.vue'
 import cartcontrol from 'components/cartcontrol/cartcontrol.vue'
 import food from 'components/food/food.vue'

 export default {
   data () {
     return {
       goods: [],
       listHeight: [],
       scrollY: 0,
       selectFood: {}
     }
   },
   props: ['seller'],
   created () {
     this.$http.get('static/data.json').then((response) => {
       response = response.body
       this.goods = response.goods
       this.$nextTick(
         () => {
           this._initScroll()
           this._calculateHeight()
         }
       )
     })
   },
   computed: {
     currentIndex () {
       for (let i = 0; i < this.listHeight.length; i++) {
         let height1 = this.listHeight[i]
         let height2 = this.listHeight[i + 1]
         if (!height2 || (this.scrollY >= height1 && this.scrollY < height2)) {
           return i
         }
       }
       return 0
     },
     selectFoods () {
       let foods = []
       this.goods.forEach((good) => {
         good.foods.forEach((food) => {
           if (food.count) {
             foods.push(food)
           }
         })
       })
       return foods
     }
   },
   methods: {
     _selectFood (food, event) {
       if (!event._constructed) {
         return
       }
       this.selectFood = food
       this.$refs.foodDesc.show()
     },
     _drop (el) {
       this.$nextTick(() => {
         this.$refs.shopcart.drop(el)
       })
     },
     _initScroll () {
       this.menuScroll = new BScroll(this.$refs.menuWrapper, {
         click: true
       })
       this.foodsScroll = new BScroll(this.$refs.foodsWrapper, {
         click: true,
         probeType: 3
       })
       this.foodsScroll.on('scroll', (pos) => {
         this.scrollY = Math.abs(Math.round(pos.y))
       })
     },
     _calculateHeight () {
       let foodList = this.$refs.foodsWrapper.getElementsByClassName('food-list-hook')
       let height = 0
       this.listHeight.push(height)
       for (let i = 0; i < foodList.length; i++) {
         let item = foodList[i]
         height += item.clientHeight
         this.listHeight.push(height)
       }
     },
     selectMenu (index, event) {
       if (!event._constructed) {
         return
       }
       let foodList = this.$refs.foodsWrapper.getElementsByClassName('food-list-hook')
       let el = foodList[index]
       this.foodsScroll.scrollToElement(el, 300)
     }
   },
   components: {
     iconDiscount,
     shopcart,
     cartcontrol,
     food
   }
 }
</script>


<style  lang="stylus" rel="stylesheet/stylus">
  @import '../../common/stylus/mixin.styl'
  .goods
    .good-wrapper
      display: flex
      display: -webkit-box
      position: fixed
      top: 174px
      bottom: 46px
      width:100%
      overflow: hidden
    .menu-wrapper
      width: 80px
      background: #f3f5f7
      .menu-item
        display: table
        width: 56px
        height: 54px
        line-height: 14px
        font-size: 14px
        padding: 0 12px
        &.current
          position: relative
          z-index: 10
          margin-top: -1px
          background: #fff
          .text
            font-weight: 700
            border-none()
        .text
          display: table-cell
          width: 56px
          border-1px(rgba(7,17,27,0.1))
          font-size: 12px
          vertical-align middle
    .foods-wrapper
      flex: 1
      -webkit-box-flex: 1
      .title
        padding-left: 14px
        line-height: 26px
        border-left: 2px solid #d9dde1
        font-size: 12px
        height: 26px
        color: rgb(147,153,159)
        background: #f3f5f7
      .food-item
        display: flex
        display: -webkit-box
        margin: 18px
        padding-bottom:18px
        border-1px(rgba(7,17,27,0.1))
        &:last-child
          border-none()
          margin-bottom: 0
        .pic
          margin-right: 10px
          img
            width: 57px
        .content
          flex: 1
          -webkit-box-flex: 1
          .name
            margin: 2px 0 8px 0
            height: 14px
            line-height: 14px
            font-size: 14px
            color: rgb(7,17,27)
          .desc,.extra
            font-size: 10px
            color: rgb(147,153,159)
          .desc
            line-height: 14px
            margin-bottom: 8px
          .extra
            .count
              margin-bottom: 12px
          .price
            font-weight: 700
            line-height: 24px
            .now
              margin-right: 8px
              font-size: 14px
              color: rgb(240,20,20)
            .old
              text-decoration: line-through
              font-size: 10px
              color: rgb(147,153,159)



        .cartcontrol-wrapper
          position: absolute
          bottom: 10px
          right: 0px

</style>
